58. Length of Last Word

简单得不得简单 不说了

class Solution { public: int lengthOfLastWord(string s) { int n = s.length(); if(n == 0) return 0; int i; int sum = 0; for(i = n - 1; s[i] == ' ' && i >= 0; -- i); for(;s[i] != ' ' && i >= 0; -- i) sum++; return sum; } };